Apparatus or machine for use in shaping articles of pottery.



P. HANCOCK. APPARATUS OR MACHINE FOR USE IN SHAPING ARTICLES OF POTTERY.

APPLIGATION FILED MAR. 27, 1911.

Patented Aug. 5, 1913.

FIG. 2

HUME

UNITED STATES PATENT OFFICE.

FREDERICK HANCOCK, OF STOKE-UPON-TRENT, ENGLAND.

APPARATUS OR MACHINE FOR USE IN SHAPING ARTICLES OF POTTERY.

Specification of Letters Patent.

Patented Aug. 5,1913.

Application filed March 27, 1911. Serial No. 617,231.

To all whom it may concern Be it known that I, Fnnnnnrox HANCOCK, asubject of the King of Great Britain and Ireland, residing atStoke-upon-Trent, England, have invented certain new and usefulImprovements in Apparatus or Machines for Use in Shaping Articles ofPottery, of which the following is a specification.

My invention relates to the class of plastic block and earthenwareapparatus, and has special reference to a novel and improved device tobe used in connection with an apparatus for shaping the exterior ofpottery and articles such as basins, jam jars, paste boxes, eletricalinsulators, and body portions of cups, mugs, tea pots, and similararticles during the course of their manufacture, and has for its objectto expedite the manufacture of such articles and to reduce the cost ofproduction thereof.

lVith the foregoing and other objects in view, the invention consists inthe construction, combination and arrangement of parts to be hereinaftermore fully described and claimed.

Heretofore outline shaping of semi-plastic articles was mainlyaccomplished on the potters horizontal lathe by the use of freehandtools.

The invention is described with reference to these accompanying drawingswhich serve to illustrate my invention Figure 1 is a sectional elevationof my improved device, the cutting blade being shown in full, a jam jarbeing supported on the spindle of a potters lathe, shown in dottedlines. Fig. 2 is a plan view of the device. Fig. 3 is a sectional planon line AB of Fig. 1, excluding the box base or table. Fig. 4 is adetail perspective view of the blade. Fig. 5 illustrates a front viewand a cross section of the blade. Fig. 6 shows some of the partsseparately.

Upon a table 1, through which passes a spindle A, to a lathe or jigger,is a vertical capstan-like tool, or device, which comprises a pillar 2,on which a sleeve 3 is rotatably fitted. The sleeve 3 is provided withadjustable radial arms 4; and 5 at its top and base respectively, thearm a being circumferentially adjustable by means of the bolts 4 in theslots 4. These arms t and 5 carry an oblique metal profile blade 6having a cutting edge at 6 The arm 5 is circumferentially adjustable bymeans of a rivet which passes from the sleeve 3, through the horizontalslot in the member 5 of the arm 5. This blade 6 is raked orparacentrically arranged with respect to its circuit of rotation in sucha manner that in any horizontal section the cutting edge is farther fromthe axis of rotation than the back edge as shown in Fig. 3. The blade 6is also arranged with its knife edge at an angle to the vertical asshown in Fig. 5 so that only a part of the edge is cutting at any time.A coil tension spring '7 is disposed between the sleeve and the table,one end of the spring being connected to the sleeve 3 and the other endto the said pillar 2. The tension spring 7 is adapted to yield to therotary action of the sleeve 3 when the tool is drawn to the work and towithdraw the tool from the work when the handle 4 is released, theaction of the spring operating to bring the tool back to its initialposition.

In practice the side cutting tool 6 is gradually brought into contactwith the clay material, by means of the upper radial arm 1, which isused as a handle. The upper radial arm 1 and the tool leaves the clay atthe point where a diametrical line crosses the spindle, if extendedwould pass through the center of the rotating tool. The tool hassuitable rake and therefore its rear portion clears the workingsurfaces, only the front edge thereof entering the clay so that when thetool is withdrawn it does not engage the clay articles.

In order to retain the cutting blade at a suitable starting point, astop lug 8 is secured to the upper side of the table 1 the back of theblade 6 contacting the stop lug 8 which limits the movement of thesleeve '3. A screw bolt 9, having an eye 10, engages with the lower endof the pillar 2, which has aprismatic lug 2 passing through a slot 11 inthe box 1 and is secured by a nut 12 the said bolt passing lateralthrough the box 1 and having a thumb nut 13 on the screw threadedprojecting end. By slackening the nut 12 and turning the thumb nut 18the bolt 9 is advanced or retracted and so causes the pillar 2 andconsequently the tool 6 to move forward or backward from, the clayarticle under treatment, and after proper adjustment the nut 12 istightened on the bolt. Or the bolt 9 may turn in a threaded part in thebox 1 and be swivelly connected with the eye 10- of the bolt 9. Byturning the bolt, the tool is moved forward or backward. Or the bolt mayengage with a projection on the sleeve in order to effect the movementas will be understood.

What I claim, and desire to secure by Let ters Patent, is

1.. In a potters tool, a table having a slot therein, a pillar having alug extending through the slot and movable therein, a sleeve rotatableon the pillar, said sleeve having an annular aperture in its base, acoil spring in. the aperture and having its ends secured respectively tothe sleeve, and to the pillar, a blade secured to the sleeve and adaptedto be brought into engagement with plastic material for coacting with alathe spindle for shaping the exterior ol said material, and means forrotating the sleeve against the action of the spring for bringing theplate into working relation.

9. In a device for COiMtlIlg with a potters lathe for shaping theexterior of plastic material, a table, a. rotatable blade carryingdevice horizontally adjustable on the table, means for effectinghorizontal adjustment of the device and resilient means for bringing thetool out of working relation with the plastic material.

3. In a potters lathe tool comprising a vertically disposed pillar,means for supporting the pillar in operative relation to a potterslathe, a sleeve rotatable on the pillar, a. horizontally disposed armpivoted on the top of the arm of the pillar, said arm having arcuateslots therein, means passing through the said slots and engaging; thesleeve for securing the arm in adjusted relation to the sleeve, a toolhaving an end secured to the arm, and having its other end secured tothe sleeve, and means for moving the tool into cooperative relation withthe lathe spindle for the purpose specified.

t. A potters lathe tool comprising a table having a slot therein, avertical pillar hav ing a lug, extending through the slot, and means foradjusting the position of the lug in the slot, a sleeve on said pillarhaving an enlarged base portion having an annular aperture therein, acoil spring in the aperture and having its ends engaged respectivelywith the pillar and sleeve, an arm pivotally adjustable on the top ofthe pillar, means for securing the arm in adjusted re lation with thesleeve, and a blade having an end secured to the arm and having itsother end acl'justably secured to the sleeve.

5. In apparatus for shaping articles of pottery, a table, a pillarsupported by the table, a rotatable sleeve surrounding the pil. lar, acutting blade supported by the rotatable sleeve, and means for adjustingthe tool to its Work.

6. In apparatus for shaping pottery, a table having a slot, a pillarsupported by the table, said pillar having a screw threaded portionextending through said slot, a rotatable sleeve surrounding said pillar,a cutting blade supported by the sleeve and adapted to rotate therewith,a screw threaded bolt secured to the screw threaded portion of thepillar, and one end of said bolt extending through an opening in theside of said table, a thumb piece on the end of said bolt which uponbeing turned advances or retracts the tool to or from its work.

7. In apparatus for shaping articles of pottery, a work support, apillar, a rotatable sleeve surrounding the pillar, an arm secured to theupper end of said sleeve, a cutter blade supported by the sleeve and thearm the cutting blade being set askew while the blade is in operation,and means for rotating said sleeve.

S. In apparatus for shaping articles of pottery, a work support, arotatable sleeve, a cutting blade adapted to operate with the sleeve,said blade comprising an arm having a knife edge adjacent one endthereof, and means for supporting the arm askew with respect to itscircuit of rotation.

In testimony whereof, I altix my signature in the presence of twowitnesses.

FREDERICK HANCOCK.

Witnesses:

GEORGE T. MILLARD, CYRIL T. CLARKE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

